fix: rebuild stock change record

stock/admin.py

@@ -1,5 +1,6 @@
 from django.contrib import admin
 from django.contrib.admin import action
+from django.utils.safestring import mark_safe
 from . import models, services
 
 
@@ -58,29 +59,43 @@ class StockSnapshotAdmin(admin.ModelAdmin):
 
     def has_delete_permission(self, request, obj = ...):
         # 禁止通过admin界面删除库存快照
-        return False
+        return True
 
     def get_readonly_fields(self, request, obj = ...):
         # 所有字段均为只读
         return [field.name for field in self.model._meta.fields]
 
 
+@admin.register(models.StockChangeDetail)
+class StockChangeDetailAdmin(admin.ModelAdmin):
+    list_display = (
+        'id',
+        'stock_change_record',
+        'product',
+        'quantity',
+        'unit',
+    )
+    search_fields = ('stock_change_record__id', 'product__name')
+    list_filter = ('stock_change_record', 'stock_change_record__type')
+    ordering = ('-created_at',)
+
+
 @admin.register(models.StockChangeRecord)
 class StockChangeRecordAdmin(admin.ModelAdmin):
     list_display = (
         'id',
         'type',
-        'product',
         'warehouse',
-        'quantity',
+        'details',
         'source_type',
         'source_id',
+        'num_of_rolls',
         'is_finished',
         'finished_at',
         'created_by',
         'created_at',
     )
-    search_fields = ('product__name', 'warehouse__name', 'source_id')
+    search_fields = ('warehouse__name', 'source_id')
     list_filter = ('type', 'source_type', 'type', 'is_finished', 'created_at')
     ordering = ('-created_at', '-updated_at')
     readonly_fields = ('created_by', 'is_finished', 'finished_at')
@@ -103,4 +118,17 @@ class StockChangeRecordAdmin(admin.ModelAdmin):
         record = queryset.first()
         services.make_stock_change_completed(record)
 
+    @admin.display(description='匹数')
+    def num_of_rolls(self, obj: models.StockChangeRecord):
+        return obj.num_of_rolls
+
+    @admin.display(description='明细概览')
+    def details(self, obj):
+        details = obj.details.all()
+        detail_list = [
+            f'{detail.product.name}, {detail.quantity}/{detail.get_unit_display()}'
+            for detail in details
+        ]
+        return mark_safe('<br>'.join(detail_list))
+
     actions = [make_selected_stock_changes_completed]